Question

Trying to put a regex expression together that returns the string between _ and _$ (where $ is the end of the string).

input:

abc_def_ghi_

desired regex outcoume:

def_ghi

I’ve tried quite a few combinations such as thsi.

((([^_]*){1})[^_]*)_$

any help appreciated.

Note: the regex above returns abc_def, and not the desired def_ghi.

Answer 1

So it’s everything between the first _ and the final _ (both excluding)?

Then try

(?<=_).*(?=_$)

(hoping you’re not using JavaScript)

Explanation:

(?<=_)  # Assert that the previous character is a _
.*      # Match any number of characters...
(?=_$)  # ... until right before the final, string-ending _